I should have added that the most important parameter to quote when discussing SUTs is, of course, the turns-ratio (or voltage multiplication factor).

I assume the various impedance inputs on 'The Head' SUT, are different tappings on the primary winding. However, to make proper sense of their impedance designation, I would need to know the various turn-ratios.

I should also like to correct a mistake I made. The input impedance of the 'disc' input of the Quad 33 preamp is 68k not the 47k I had assumed. With the Nakamichi SUT this presents a load of ~170 Ohm to the cartridge. Probably even better for the EMT and just as good for the Denon 103.

Regards